To search for Technical Documentation and prices, enter the product model number or model name (Sample = K-3467) at the top Search and click Find> for options. Select "Parts Catalog" or "Owners Manual" for parts selection ,  look for the appropriate part number as they look like this = 84499 Enter the first 5 characters at the top Search and click on Find>  Genuine Parts Options and prices will appear, you may buy online from these options.
                                                                       
1970 to mid 1980 whirlpool bath tubs using Wall Timer     Air On-off units mid 80              Most Common Parts Sold

                Find your fixture or faucet from pictures below. Follow the menus until you find your model number or name.